US6497756B1 - Service life indicator for respirator cartridge - Google Patents
Service life indicator for respirator cartridge Download PDFInfo
- Publication number
- US6497756B1 US6497756B1 US09/659,296 US65929600A US6497756B1 US 6497756 B1 US6497756 B1 US 6497756B1 US 65929600 A US65929600 A US 65929600A US 6497756 B1 US6497756 B1 US 6497756B1
- Authority
- US
- United States
- Prior art keywords
- cartridge
- sidewall
- sensor
- color
- display window
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/02—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography
- B01D53/04—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography with stationary adsorbents
- B01D53/0454—Controlling adsorption
-
- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62B—DEVICES, APPARATUS OR METHODS FOR LIFE-SAVING
- A62B18/00—Breathing masks or helmets, e.g. affording protection against chemical agents or for use at high altitudes or incorporating a pump or compressor for reducing the inhalation effort
- A62B18/08—Component parts for gas-masks or gas-helmets, e.g. windows, straps, speech transmitters, signal-devices
- A62B18/088—Devices for indicating filter saturation
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/02—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography
- B01D53/04—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography with stationary adsorbents
- B01D53/0407—Constructional details of adsorbing systems
- B01D53/0415—Beds in cartridges
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2253/00—Adsorbents used in seperation treatment of gases and vapours
- B01D2253/10—Inorganic adsorbents
- B01D2253/102—Carbon
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/20—Halogens or halogen compounds
- B01D2257/204—Inorganic halogen compounds
- B01D2257/2045—Hydrochloric acid
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/20—Halogens or halogen compounds
- B01D2257/204—Inorganic halogen compounds
- B01D2257/2047—Hydrofluoric acid
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2259/00—Type of treatment
- B01D2259/45—Gas separation or purification devices adapted for specific applications
- B01D2259/4541—Gas separation or purification devices adapted for specific applications for portable use, e.g. gas masks
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/02—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography
- B01D53/06—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography with moving adsorbents, e.g. rotating beds
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S55/00—Gas separation
- Y10S55/33—Gas mask canister
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S55/00—Gas separation
- Y10S55/34—Indicator and controllers
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S55/00—Gas separation
- Y10S55/35—Respirators and register filters
Definitions
- an apparatus and method for mounting the improved ESLI cartridge on the respirator mask provides means for continuously rotating the sealed cartridge to properly align the ESLI sensor for viewing.
- a continuously rotatable mounting for the cartridge is required to allow the wearer of the respirator to move the color-changing sensor into the wearer's field of view. If the cartridge is attached to a full face mask, the sensor will have to be viewed through the transparent portion of the respirator facepiece.
Landscapes
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Engineering & Computer Science (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Pulmonology (AREA)
- General Health & Medical Sciences (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Respiratory Apparatuses And Protective Means (AREA)
Abstract
Description
Field | Color | Contaminant |
A | Orange | (Unexposed) |
B | Red | HCl |
C | Brown | HF |
D | Peach | SO2 |
Claims (26)
Priority Applications (7)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US09/659,296 US6497756B1 (en) | 2000-09-12 | 2000-09-12 | Service life indicator for respirator cartridge |
CA002405552A CA2405552C (en) | 2000-09-12 | 2001-09-12 | Respirator cartridge with service life indicator |
AU2001290966A AU2001290966B2 (en) | 2000-09-12 | 2001-09-12 | Respirator cartridge with service life indicator |
PCT/US2001/028836 WO2002022237A1 (en) | 2000-09-12 | 2001-09-12 | Respirator cartridge with service life indicator |
JP2002526481A JP2004508153A (en) | 2000-09-12 | 2001-09-12 | Gas mask cartridge with effective life indicator |
AU9096601A AU9096601A (en) | 2000-09-12 | 2001-09-12 | Respirator cartridge with service life indicator |
EP01971030A EP1305104A1 (en) | 2000-09-12 | 2001-09-12 | Respirator cartridge with service life indicator |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US09/659,296 US6497756B1 (en) | 2000-09-12 | 2000-09-12 | Service life indicator for respirator cartridge |
Publications (1)
Publication Number | Publication Date |
---|---|
US6497756B1 true US6497756B1 (en) | 2002-12-24 |
Family
ID=24644853
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US09/659,296 Expired - Fee Related US6497756B1 (en) | 2000-09-12 | 2000-09-12 | Service life indicator for respirator cartridge |
Country Status (6)
Country | Link |
---|---|
US (1) | US6497756B1 (en) |
EP (1) | EP1305104A1 (en) |
JP (1) | JP2004508153A (en) |
AU (2) | AU2001290966B2 (en) |
CA (1) | CA2405552C (en) |
WO (1) | WO2002022237A1 (en) |
Cited By (55)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20030145732A1 (en) * | 2002-02-07 | 2003-08-07 | Leffel Jeffry Marvin | Screened carbon trap protection |
US20040079058A1 (en) * | 2001-10-26 | 2004-04-29 | Mcgahey Harry V. | Window biological and chemical contamination filter |
US20040083896A1 (en) * | 2002-07-17 | 2004-05-06 | Mihaylov Gueorgui Milev | End of service life indicator for fluid filter |
US20040129142A1 (en) * | 2003-01-07 | 2004-07-08 | Wallace Wireman | Deodorizer mounting |
US6776158B1 (en) * | 2001-07-26 | 2004-08-17 | Euthanex Corporation | System for anesthetizing laboratory animals |
US20040163367A1 (en) * | 2003-02-25 | 2004-08-26 | Cogar William K. | Thermochromic filter apparatus for computer |
US20040216737A1 (en) * | 2001-07-26 | 2004-11-04 | Anderson Leslie B. | System for anesthetizing laboratory animals |
US20050155665A1 (en) * | 2002-04-25 | 2005-07-21 | John Schlacchter | Respirator filter canisters and method of filling same |
US20060090754A1 (en) * | 2004-10-29 | 2006-05-04 | 3M Innovative Properties Company | Respiratory protection device that has rapid threaded clean air source attachment |
US20060203187A1 (en) * | 2005-03-11 | 2006-09-14 | Jan-Joost Pieterman | Adjustable prescription lens insert for safety eyewear |
WO2007093640A1 (en) * | 2006-02-17 | 2007-08-23 | Zeosys Gmbh | Filter cartridge for recuperating halogenated hydrocarbons |
WO2007098540A1 (en) * | 2006-03-01 | 2007-09-07 | Resmed Ltd | Method and apparatus for reminding user to replace and/or service cpap apparatus and/or component thereof |
US20070209978A1 (en) * | 2006-03-10 | 2007-09-13 | Mitchell Alan J | Enhanced filter indicatior for refrigerator |
US20080053447A1 (en) * | 2006-08-29 | 2008-03-06 | Ratajczak John A | Adapter for air purifying filter |
US20080063575A1 (en) * | 2006-09-11 | 2008-03-13 | 3M Innovative Properties Company | Organic Vapor Sorbent Protective Device With Thin-Film Indicator |
US20080072909A1 (en) * | 2006-08-31 | 2008-03-27 | Nellcor Puritan Bennett Incorporated | Adjustable patient interface for a breathing assistance system |
US20080134462A1 (en) * | 2004-03-15 | 2008-06-12 | Koninklijke Philips Electronics N.V. | Separation Assembly For a Vaccuum Cleaner With Multi-Stage Dirt Separation |
US20080251053A1 (en) * | 2007-04-16 | 2008-10-16 | Shears Peter D | Evaporative emissions control system |
US20080251055A1 (en) * | 2007-04-16 | 2008-10-16 | Briggs & Stratton Corporation | Evaporative emissions control system |
US7442237B1 (en) * | 2004-09-16 | 2008-10-28 | The United States Of America As Represented By The Secretary Of The Army | Multi-agent end-of-service-life indicator for respirator filters |
US20090056536A1 (en) * | 2007-08-30 | 2009-03-05 | The Boeing Company | Service life indicator for chemical filters |
US20090065006A1 (en) * | 2007-09-07 | 2009-03-12 | Keith Patterson | Filtering respirator with rotatable filter |
US20090298192A1 (en) * | 2008-05-30 | 2009-12-03 | Scott Technologies, Inc. | Determining effluent concentration profiles and service lives of air purifying respirator cartridges |
US20100294274A1 (en) * | 2009-05-22 | 2010-11-25 | 3M Innovative Properties Company | Filter cartridge having cone of visibility for end-of-service-life-indicator (esli) |
US20100294272A1 (en) * | 2009-05-22 | 2010-11-25 | 3M Innovative Properties Company | Filter cartridge having cover for masking service life indicator |
US20100294273A1 (en) * | 2009-05-22 | 2010-11-25 | 3M Innovative Properties Company | Filter cartridge having location-registered view window for end-of-service-life-indicator (esli) |
US7860662B2 (en) | 2008-12-17 | 2010-12-28 | Scott Technologies, Inc. | Systems and methods for determining filter service lives |
US20110094514A1 (en) * | 2009-10-23 | 2011-04-28 | 3M Innovative Properties Company | Patterned chemical sensor having inert occluding layer |
US20110271479A1 (en) * | 2010-05-05 | 2011-11-10 | Miele & Cie. Kg | Filter and vacuum cleaner having such a filter |
US20120111330A1 (en) * | 2010-11-08 | 2012-05-10 | Kristina Ann Gartner | Mask for providing a visual cue |
WO2012044429A3 (en) * | 2010-10-01 | 2012-05-31 | 3M Innovative Properties Company | Portable monitor for end of service life indication |
WO2012044430A3 (en) * | 2010-10-01 | 2012-06-21 | 3M Innovative Properties Company | Method for correlating a monitoring device to the end of service life of a filter cartridge |
WO2012134712A1 (en) | 2011-03-28 | 2012-10-04 | 3M Innovative Properties Company | Sensor comprising a masking layer adhesive |
US8459200B2 (en) | 2008-06-30 | 2013-06-11 | 3M Innovative Properties Company | Exposure indicating device |
WO2013090052A1 (en) * | 2011-12-12 | 2013-06-20 | 3M Innovative Properties Company | End of service life indicating systems for layered filter cartridges |
US8534123B2 (en) | 2010-06-17 | 2013-09-17 | Cummins Filtration Ip Inc. | Engine air filter replacement indication system |
US8616205B2 (en) | 2010-10-06 | 2013-12-31 | Honeywell International Inc. | Respirator with end-of-service-life detection |
US20140014098A1 (en) * | 2012-07-11 | 2014-01-16 | Be Aerospace, Inc. | Aircraft crew member protective breathing apparatus |
US8821621B2 (en) | 2010-04-02 | 2014-09-02 | 3M Innovative Properties Company | Filter systems including optical analyte sensors and optical readers |
US20150020800A1 (en) * | 2013-07-19 | 2015-01-22 | Honeywell International Inc. | End of service life indicator for a respirator |
US9011584B2 (en) | 2011-08-25 | 2015-04-21 | Honeywell International Inc. | End of service life indicator for respirator |
US9061224B2 (en) | 2010-06-09 | 2015-06-23 | Cummins Filtration Ip Inc. | System for monitoring and indicating filter life |
US9134251B2 (en) | 2010-09-23 | 2015-09-15 | 3M Innovative Properties Company | Porous chemical indicator for gaseous media |
US20160059049A1 (en) * | 2013-03-15 | 2016-03-03 | Scott Health & Safety Limited | Respirator Filter Interface |
TWI556851B (en) * | 2014-08-28 | 2016-11-11 | 金鐘基 | Mounting device for gas mask canister |
US20170080263A1 (en) * | 2015-09-18 | 2017-03-23 | Chih-Tsung Chiu | Mask |
US20170080261A1 (en) * | 2014-05-16 | 2017-03-23 | Scott Technologies, Inc. | System and method for monitoring a service life of a filter with a respirator filter sampling port assembly |
US9751038B2 (en) | 2013-03-15 | 2017-09-05 | 3M Innovative Properties Company | End of service life indicating systems for layered filter cartridges |
US10105556B2 (en) | 2013-03-15 | 2018-10-23 | Scott Technologies, Inc. | Respirator filter interface |
US20200054901A1 (en) * | 2017-01-07 | 2020-02-20 | Mahesh KUDAV | Twist And Click Locking Mechanism Of Replaceable Non Symmetrical Filter And Inner Yoke Fitting Part Of Half Mask Face Piece |
US10576407B2 (en) | 2010-08-06 | 2020-03-03 | Scott Technologies, Inc. | Method and apparatus for integrating chemical and environmental sensors into an air purification filter through a reusable sensor post |
US11235182B2 (en) | 2014-09-05 | 2022-02-01 | Honeywell International Inc. | End of service life indicator for disposal mask |
US20220219023A1 (en) * | 2021-01-14 | 2022-07-14 | Ford Global Technologies, Llc | Personal air purifying respirator |
US11766080B2 (en) | 2020-06-26 | 2023-09-26 | Mark Lamoncha | Face shield for attachment to goggles or eyeglasses |
US11865261B2 (en) | 2020-07-14 | 2024-01-09 | Mark Lamoncha | Respirator mask |
Families Citing this family (5)
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AU2003294535A1 (en) | 2002-12-20 | 2004-07-14 | Fiso Technologies Inc. | Polarisation interferometric method and sensor for detecting a chemical substance |
JP4981741B2 (en) * | 2008-04-28 | 2012-07-25 | 興研株式会社 | Absorption can |
RU2513773C1 (en) * | 2010-04-02 | 2014-04-20 | 3М Инновейтив Пропертиз Компани | Filter system including structured optical sensors of analytes and optical readers |
CA2810649A1 (en) * | 2010-09-07 | 2012-03-15 | Nextteq Llc | Remaining service life indication system for gas mask cartridges and canisters |
KR102613220B1 (en) * | 2021-10-13 | 2023-12-14 | 울산과학기술원 | Branch type gas sensor module for measuring the remaining life of harmful gas filtration system |
Citations (24)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1537519A (en) * | 1924-12-05 | 1925-05-12 | Yablick Max | Indicating gas-mask canister |
US2621753A (en) * | 1948-01-29 | 1952-12-16 | Dry Air Products Co | Unit desiccator |
US3161491A (en) * | 1961-03-15 | 1964-12-15 | Electric Storage Battery Co | Respirator filter unit |
US3171729A (en) * | 1961-07-27 | 1965-03-02 | Chem Met Anderson Engineering | Method of making a parison |
US3966440A (en) * | 1975-06-03 | 1976-06-29 | Catalyst Research Corporation | Colorimetric vinyl chloride indicator |
US4133656A (en) * | 1976-03-23 | 1979-01-09 | Becton, Dickinson And Company | Bacteria filters with transparent housings |
US4154586A (en) | 1978-01-13 | 1979-05-15 | American Optical Corporation | Respirator cartridge end-of-service lift indicator system and method of making |
US4155358A (en) | 1976-12-13 | 1979-05-22 | Minnesota Mining And Manufacturing Company | Respirator |
US4324558A (en) | 1979-08-02 | 1982-04-13 | Obermayer Arthur S | Method of monitoring toxic fluids |
US4326514A (en) | 1980-06-20 | 1982-04-27 | Minnesota Mining And Manufacturing Company | Cartridge respirator with service life indicator |
US4428907A (en) * | 1981-02-23 | 1984-01-31 | Nederlandse Centrale Organizatie Voor Toegepast Natuurwetenschappelijk Onderzoek | Detector for detecting air components |
US4530706A (en) | 1981-10-19 | 1985-07-23 | American Optical Corporation | Respirator cartridge end-of-service life indicator |
US4543112A (en) | 1984-04-30 | 1985-09-24 | Figgie International Inc. | Sorbent type filter assembly for a respirator and method of making same |
US4572725A (en) * | 1983-12-30 | 1986-02-25 | Nippon Air Brake Co., Ltd. | Air dryer device |
US4684380A (en) * | 1984-12-14 | 1987-08-04 | Dragerwerk Ag | Colorimetric indicator for the indication of the exhaustion of gas filters |
US4999034A (en) * | 1989-02-08 | 1991-03-12 | Sud-Chemie Aktiengesellschaft | Desiccant cartridge |
US5099970A (en) | 1991-05-10 | 1992-03-31 | Diebel Manufacturing Company | Torque-limiting clutch brake assembly |
US5110003A (en) | 1990-06-28 | 1992-05-05 | Stant Inc. | Torque-override cap |
US5297544A (en) | 1991-10-01 | 1994-03-29 | Dragerwerk Ag | Respirator with inner half mask and pollutant indicator |
US5634426A (en) | 1995-02-22 | 1997-06-03 | Tomlinson; Bruce | Absorption depletion indicators for anesthetic gas administration systems |
US5638970A (en) | 1989-02-03 | 1997-06-17 | Senetics, Inc. | Child-resistant indicator cap |
US5720328A (en) | 1996-07-31 | 1998-02-24 | Mecrom Ott U. Holey Ohg | Self-closing gas cap for automatic filling machines |
US5969588A (en) | 1998-09-15 | 1999-10-19 | Nelson; Victor H | Ratchet and ball magnetic index device |
US6055983A (en) | 1997-03-11 | 2000-05-02 | Parmelee Industries | Respirator filtration device |
-
2000
- 2000-09-12 US US09/659,296 patent/US6497756B1/en not_active Expired - Fee Related
-
2001
- 2001-09-12 AU AU2001290966A patent/AU2001290966B2/en not_active Ceased
- 2001-09-12 JP JP2002526481A patent/JP2004508153A/en active Pending
- 2001-09-12 CA CA002405552A patent/CA2405552C/en not_active Expired - Fee Related
- 2001-09-12 AU AU9096601A patent/AU9096601A/en active Pending
- 2001-09-12 EP EP01971030A patent/EP1305104A1/en not_active Withdrawn
- 2001-09-12 WO PCT/US2001/028836 patent/WO2002022237A1/en not_active Application Discontinuation
Patent Citations (25)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1537519A (en) * | 1924-12-05 | 1925-05-12 | Yablick Max | Indicating gas-mask canister |
US2621753A (en) * | 1948-01-29 | 1952-12-16 | Dry Air Products Co | Unit desiccator |
US3161491A (en) * | 1961-03-15 | 1964-12-15 | Electric Storage Battery Co | Respirator filter unit |
US3171729A (en) * | 1961-07-27 | 1965-03-02 | Chem Met Anderson Engineering | Method of making a parison |
US3171729B1 (en) * | 1961-07-27 | 1965-03-02 | ||
US3966440A (en) * | 1975-06-03 | 1976-06-29 | Catalyst Research Corporation | Colorimetric vinyl chloride indicator |
US4133656A (en) * | 1976-03-23 | 1979-01-09 | Becton, Dickinson And Company | Bacteria filters with transparent housings |
US4155358A (en) | 1976-12-13 | 1979-05-22 | Minnesota Mining And Manufacturing Company | Respirator |
US4154586A (en) | 1978-01-13 | 1979-05-15 | American Optical Corporation | Respirator cartridge end-of-service lift indicator system and method of making |
US4324558A (en) | 1979-08-02 | 1982-04-13 | Obermayer Arthur S | Method of monitoring toxic fluids |
US4326514A (en) | 1980-06-20 | 1982-04-27 | Minnesota Mining And Manufacturing Company | Cartridge respirator with service life indicator |
US4428907A (en) * | 1981-02-23 | 1984-01-31 | Nederlandse Centrale Organizatie Voor Toegepast Natuurwetenschappelijk Onderzoek | Detector for detecting air components |
US4530706A (en) | 1981-10-19 | 1985-07-23 | American Optical Corporation | Respirator cartridge end-of-service life indicator |
US4572725A (en) * | 1983-12-30 | 1986-02-25 | Nippon Air Brake Co., Ltd. | Air dryer device |
US4543112A (en) | 1984-04-30 | 1985-09-24 | Figgie International Inc. | Sorbent type filter assembly for a respirator and method of making same |
US4684380A (en) * | 1984-12-14 | 1987-08-04 | Dragerwerk Ag | Colorimetric indicator for the indication of the exhaustion of gas filters |
US5638970A (en) | 1989-02-03 | 1997-06-17 | Senetics, Inc. | Child-resistant indicator cap |
US4999034A (en) * | 1989-02-08 | 1991-03-12 | Sud-Chemie Aktiengesellschaft | Desiccant cartridge |
US5110003A (en) | 1990-06-28 | 1992-05-05 | Stant Inc. | Torque-override cap |
US5099970A (en) | 1991-05-10 | 1992-03-31 | Diebel Manufacturing Company | Torque-limiting clutch brake assembly |
US5297544A (en) | 1991-10-01 | 1994-03-29 | Dragerwerk Ag | Respirator with inner half mask and pollutant indicator |
US5634426A (en) | 1995-02-22 | 1997-06-03 | Tomlinson; Bruce | Absorption depletion indicators for anesthetic gas administration systems |
US5720328A (en) | 1996-07-31 | 1998-02-24 | Mecrom Ott U. Holey Ohg | Self-closing gas cap for automatic filling machines |
US6055983A (en) | 1997-03-11 | 2000-05-02 | Parmelee Industries | Respirator filtration device |
US5969588A (en) | 1998-09-15 | 1999-10-19 | Nelson; Victor H | Ratchet and ball magnetic index device |
Cited By (97)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6776158B1 (en) * | 2001-07-26 | 2004-08-17 | Euthanex Corporation | System for anesthetizing laboratory animals |
US20040216737A1 (en) * | 2001-07-26 | 2004-11-04 | Anderson Leslie B. | System for anesthetizing laboratory animals |
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CA2405552C (en) | 2005-07-26 |
AU9096601A (en) | 2002-03-26 |
AU2001290966B2 (en) | 2004-03-04 |
CA2405552A1 (en) | 2002-03-21 |
WO2002022237A1 (en) | 2002-03-21 |
JP2004508153A (en) | 2004-03-18 |
EP1305104A1 (en) | 2003-05-02 |
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